Hi. The "overlapping X's" are a W and an A.I have I guess what is an old valve wrench with what looks like a "Z" in a circle. Can't find this logo anywhere. I'm assuming it would stand for the drop forge company? The opening isn't a true square. Also has what looks like two overlapping X's. It's a mystery to me.
Or an A and a V, with two little W's.Hi. The "overlapping X's" are a W and an A.
AA said:Woo-hoo! I just found a goldmine of forge mark logos .. do a google books search for 'custom forging capability' and there's a chart of companies with their logos ..
I was able to identify an HT-circle logo as Harris-Thomas Drop Forge .. never thought I'd find that one.
AA
I think I have a Oswego Tool Company wrench. The only logo is a circle with a "T" inside. A similar logo was used by Osaka Tanko. This wrench is 8" long and is also marked with matching numbers on the jaw and wrench. It features a easily removable adjuster. Simply unscrew the jaw and then the adjuster can be moved to the side and lifted out. I have a 1920 ad showing this feature on a "S" wrench. Cannot locate any straight wrenches with this feature and logo. Any thoughts on if this wrench is earlier, later, or same time as the "S" model?
Oswego / Oswego Tool Co., 119-27 W. First St., Oswego, NY / "Giles Patent wrench" / patent 391957 Oct 30 1888 J.A. Giles / http://alloy-artifacts.org/other-makers-p2.html#oswego / https://www.vintagetools.net/product/oswego-tool-co-8-inch-stilson-wrench-561pc / http://toolarchives.com/node/253 /

An aside on this: the machinist square with B [dot] S logo appears as early as the 1905 catalog.

This is a dental supply company. I found it once before:
SS White Dental
That’s usually a Pexto mark for their Worth sub brand. Check the names in this post for others who used it, see who you like for vises.
It was discussed in the Pexto thread, including here...if i remember correctly this logo was discussed but i haven't been able to find the posting...
...and more substantively, HERE, when I found and posted the TM that Don just reposted.Peck, Stow, and Wilcox owned a bunch of TM's for various brands, including Worth (reg. 1935, first use 1914), and Boro, Iroquois, Tool Island, and - believe it or not, a giant asterisk symbol (which may solve a long-standing GJ mystery!
...and his linking you to the Ben Hurs tools thread, a large asterisk was used by others, believe it or not, despite the PEXTO TM, complicating the ID.That’s usually a Pexto mark for their Worth sub brand. Check the names in this post for others who used it, see who you like for vises.
@Private Lugnutz may have clues
thanks, i'll go with pexto using this ad posted from years back.... it shows vises and explains tm good enough for me.It was discussed in the Pexto thread, including here...
...and more substantively, HERE, when I found and posted the TM that Don just reposted.
As RTM alludes at the end of his post here...
...and his linking you to the Ben Hurs tools thread, a large asterisk was used by others, believe it or not, despite the PEXTO TM, complicating the ID.
Those are usually a little different from each other and the PEXTO version, however, with more radii, or the entire symbol is oriented (turned, if you will) so that the radii are not pointing the same directions.
Having said all that as a caution, the symbol on your vise slide sure does look PEXTO-ish.
PEXTO did sell vises. I've seen them in the back of catalogs with clamps.
I am currently doing a study on handplanes with short lever caps. There are some with the six pointed asterisk design, including:^ Perfect. Glad you followed link and saw that. I completely forgot I posted that. Oh, and nice find! Post a pic of the whole vise in the PEXTO thread when get the opportunity.

Something else is the actual shape of the six arms. The trademark indicated they are teardrop shaped with a center dot. Some of these I've mentioned are more like rectangles. Close, but not exactly the same. what they do all have in common are six arms. A regular asterisk has five. I also noticed many of them are used on tools sold by hardware stores. Hibbard Spencer & Bartlett started a association of hardware stores in about 1932. Could they have combined orders for similar tools with only the name changed and a few other details like paint color, nickel plating, etc. specified?^ Interesting. That kind of somewhat surprising proliferation and variance in the use of the same basic symbol, not strictly unique to PEXTO, is what RTM was alluding to me having alluded to before. Other than pointing out the Ben Hur, Vlchek and SK examples, I never studied it further, though.
Might be true for the tools you are including in your study, but not overall. If you go in to the "Ben Hur" tools thread that RTM linked above, because that's the thread I kind of made fun out of the false asterisk situation, there's one with six (6) radii and one with eight (8) radii! As I commented there, whether it was a mistake or they just didn't care, and any old asterisk or star-like shape will do, I don't know.....what they do all have in common are six arms.